I have a couple possibilities!

Ella Grimm is a Hogsmeade resident, same age, but Ella won't be starting Hogwarts this year as she just turned ten in February. They're pretty opposite, Ella had been raised in a quidditch family and is of ~dubious parentage (she is a claimed bastard of her father) but she's super sweet and outgoing! She and her house elf bff run around Hogsmeade on their own a lot.

I also play Quincey Honeyduke who owns the sweet shop and @"Daffodil Potts" who runs the local florist if either one of them does anything for you!